What is boring machine hole?
The drill head is pointed, in the actual drilling process, because the drill has just begun to be greatly affected by the force of the workpiece, prone to deviation, resulting in drilling hole error is large, and can not meet the design requirements tolerance range requirements. The drilling machine hole is to drill holes in the center of the location, first hit a small hole (or groove), is the drill head can drill down the hole, to ensure that the drill bit around the force evenly, reducing deviation.
I don't explain what the drilling machine is. The main function of the hole is to make a hole in the hole in order to make the hole reach the exact position
The drill head is pointed, in the actual drilling process, because the drill has just begun to be greatly affected by the force of the workpiece, prone to deviation, resulting in drilling hole error is large, and can not meet the design requirements tolerance range requirements. The drilling machine hole is to drill holes in the center of the location, first hit a small hole (or groove), is the drill head can drill down the hole, to ensure that the drill bit around the force evenly, reducing deviation.
